Hi All
On 05.01.2021 12:39, Victor Gamov wrote:
Hi Eugene!
Thanks for your responces.
And Happy New Year for everyone!
On 01.01.2021 03:19, Eugene Grosbein wrote:
30.12.2020 23:08, Victor Gamov wrote:
As I understand hw.ix.flow_control=3 to allow flow-control for
negotiation.
Real PAUSE setting will be set during negotiation.
At the moment of congestion.
As I understand PAUSE feature negotiated during auto-negotiation
process. If flow-control disabled on one side (switch for example) then
other side (host) will not to use this feature too. Is it right?
So where I can find active flow-control setting for host interface?
Can't check for ix just now, but for em(4) there is sysctl dev.em.0.fc.
It should be similar for ix.
I have hw.ix.flow_control=3 (what does is it means ?) and dev.ix.0.fc=3
(and what does is it means?)
maybe increase kern.ipc.maxsockbuf and then net.inet.udp.recvspace.
Eugene, at first message you suppose Host-A (sender) "outgoing link
for that UDP packets is congested"
because this host shows non-zero "dropped due to full socket buffers".
So is net.inet.udp.recvspace increasing on Host-B (mainly receiver)
will be affected for this congestion?
Can't tell in details without going deep into your setup :-)
You can try it yourself and verify quickly.
Or I need to try to increase both kern.ipc.maxsockbuf and
net.inet.udp.recvspace on both hosts?
Tune one that drops UDP.
Also how I can check current sockbuf usage?
netstat -xn
Unfortunately it never shoes counters about UDP multicast traffic.
I'll increase kern.ipc.maxsockbuf and net.inet.udp.recvspace at next
week and write about results.
I increase kern.ipc.maxsockbuf from 2097152 -> 2597152 -> 3145728 but
netstat -sn -p udp | grep 'dropped due to full socket buffers' still
show dropped packets.
Then I increase net.inet.udp.recvspace 84160 -> 105200 but 'dropped due
to full socket buffers' packets still here.
Do I need to try to increase something else?
--
CU,
Victor Gamov
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